The big notice that states that the site does not work in IE6 is a bit over the top. Is there no way you can get the site to work in IE6? Not even a dumbed-down version? If it’s a concoius effort to get everyone to upgrade then I applaud you but maybe have the warning saying "This site is not designed to be displayed in IE6, please upgrade your browser" but then have a way to click through it for a dumbed-down version, simply to support the people (like me) who are forced to put up with IE6 at work and are not able to upgrade to IE7.
I’m sure these suggestions involve a lot of work just to support an aging browser and whilst not being a pro designer, I don’t like seeing corners being cut for the sake of an easy life.